ATI RN
Exam Questions on Cells Tissues and Organs Questions
Question 1 of 5
An exact copy of each DNA strand is made during:
Correct Answer: D
Rationale: Replication creates an exact DNA copy during the S phase.
Question 2 of 5
Na is the chemical symbol for:
Correct Answer: D
Rationale: Na represents sodium, an alkali metal, on the periodic table.
Question 3 of 5
A radioactive isotope which is intentionally put into a human body for the purpose of watching it within the person and then follow metabolic functions is called a(n)
Correct Answer: C
Rationale: Radioactive tracers (e.g., iodine-131) track metabolic processes in medical imaging.
Question 4 of 5
What type of bond forms between water molecules?
Correct Answer: A
Rationale: Hydrogen bonds form between water molecules due to polarity (O-H attractions).
Question 5 of 5
Identify the 4 classes of macromolecules important to life.
Correct Answer: C
Rationale: The four macromolecules are carbohydrates, lipids, nucleic acids, and proteins.